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The simplest analogy is a light bulb vs a laser.

In physics, coherence refers to the fixed relationship between the phase of waves in a beam of radiation of a single frequency.

A light bulb produces incoherent light, the field is not arranged in any specific way and the light goes in all directions. A 5 watt bulb is pretty weak. The effects are additive so you need a lot of energy to increase the wattage and produce more light.

A laser is a coherent arrangement of fields and produces a concentrated directional form of light. The effects are not additive, but multiplicative, so a 5w laser will burn a hole in most materials. Lasers are a type of point source or zero point energy. So are magnets, because the fields are coherent.